Drilling apparatus



Lszmso Sept. 22, 1931. E. G. GARTIN DRILLING APPARATUS Filed July 27, 1928 l m. u l w .a x m w w f .m e w n@ vf modified.

Patented Sept. 22, i

ELMER e. GARTIN, OFCLAREMONT, HAMPSHIRE,` ASSI'GNOB. To kSULLIVAN `isin- C HINnnr. COMPANY; .av CORPORATION or .MASSACHUSETTS APPARATUS i Aplican@ mea July 2v,

Y* My invention relates -to drilling apparatus and'particularly to a mounting forl rock drills. ,Y

One object of my invention --isftoprovide 'an improved drilling apparatus.' Another object is to` provide improved-resilient'means for connecting a rock drilltoits mounting. Still another object isfto1provide al1-fimproved mounting -of Siarnpliliedy A construction to Which a rock drill of standardrconstrucvtion., may be resilientlly connected. '#Other objects and advantagesl'of the invention will hereinafter more `fully appear.-

Y' In the accompanying drawings `I- have +5 shown for purposes ofv illustration one preferred form* and two modiications rthereof Which-'the invention may assume in pracf. tice."VK Y In these dra'wingsfe- "Fig lis a side elevationalfview of a drill mounting and drill with parts broken away to shoW --details of my invention.

FigQQ is -a transverse sectional view on line Q-QofFig 1. A -f Fig. 3` is a view similar to Fig. 1, illustrating a modified construction.v Fig. 4 isa vertical `section on a line c'orresponding to line of Fig. .3, showing howv the y.construction may be still further In Fig. 1201: the drvvings there is shown a common` form off shell -inounting for rock drills generally designated r1 havinga coni fcalbearing support-2 adaptedffor connection 3%5 to a tripod or quarry bannot shown. Y'-A cradle 3 is slidablymounted oni-the shell "1 by means ci guides 4 on'. the *cradle`V cooperating vvith guidevvays- 5v-`on vthe shell.` TheV cradle isprovided with' a feednutY boss t6 inL 40 vwhich is secured a `eed'nut 7 llniving inter-k nal threads cooperatingvvith threads onthe usual feed screW'S. The lfeedfsorevv is sup ported in bearings ontheshell, one oWh-ich yis indicated at E9, the "latter Vbeing''connected 45 tothe shell lby meansbflbolts landsleeves 11. The @usual handle IQ-isshovvn forV manually `operating the feed screw'to feed the drilll and cradleJ relative tothe Shelli A rock drill generally designated 13,k 50 which maybe, as vherein-Shownf, ofthe comp V192s. Seriana-295,814. I

mon mounted 'drifter' type, is Vprovided integral guides 14 slidably/ receivedfinigude.- Ways' 15 :provided bythe cradlerasbest shown in Fig. 2. Y Details of constructiony of vthe rock drill per sew'do not enter into fthe present inventionand accordingly Wi'l not be .furtherfdiscuss'ed Y In addition to the guides cylinder `vhas also' a pair offdepending lugs 16 and'lf', hereinvk shown 'formedfir-itegraliv therevvithi which are provided 'with alined T14, uiefmckfufin lholes for receiving afbolt 18. A bossk 19 :pro-k jects upwardly 'from' the cradle adj acentpthe Vfeed nut and between lugs 16 and 17fonv`the cylinder and is also provided with` a lcentral aperture alined With theaperturesinflugs l '16', '17 for-receiving the bolt 18. 'Obviously one `or the other offthelugsl, 17 Would-be made detachable, or else the :boss 19 would be made detach-able from the cradle, ifthe -guideslliare made vintegralyvith the drill, to permit assembly. A pair :of Vsprings 20 and 21-are interposed betWeenfthe/boss 19 and rlugs 16 and 17 .forthe purpose vof pro- *viding `a resilient Vconnection K etween the rock drill and the cradle. With this construction it will be observed 'that the drill lisfheldf rigidly againstY any transverselateral orvertical movementby` means of the fw guides .Miandfguideways 15 which at 'the'.

same-time permit aV certain amountof longitudinal-movement. I

i v. During operation-of the hammer drill, 'Whenshoclrs are limparted thereto onY account -ofvibrationor any otherfrcauseg'thes springs-2t) will cushionsuch vibration: and shock and preventl the same frombeing transmitted to lthefcradle and tripod;

'cushiioningmovements of the vrock drill in l :either direction relative tol-thecradleinzthe` The'con'struction shown in Fig.- 3 'isidentical vvitli-l that shown Lin Figs. land 2-withsamemanner yas ydescribed in connection 'the vpreferred construction; This Vconstructionunayepossibly have some advantages fas regardssimplicityand cost of manufacture.

In Fig. 4 there is shown a modification ofv the guide structure for connecting the drill to the cradle. Instead of forming a pair of guides such as 14 in Fig, 2, the rock drill cylinder has a pair of guideways formed integral therewith which areceivea pairfo'f guides '26 on', the cradle. In all other respects the construction shown in Fig. L is identical with the construction shown and` described in Figsl and 2.

As a result of'my invention it willbe apparent that improved means ofvery siniple and rugged construction have been provided for resiliently connecting the rock drill toa cradle which will `materiallylessen vibration,.transmitted toA the supporting structure `of Ythe drill, Vthereby tending to vincrease thel stability., of the mounting and ieduce breakage of theparts.V i

VVhile I have in this application specif- 1 ically described one form and two lmodifications which my invention may assume in practice, itvwill be understood that this form and `modiications vof they samehavebeen used for? purposes ofi illustration and that .the invention may be modiied and; embodied in various other forms without departing from its 'spirit or the scope of the appended claims. Y f Y v n What I claim as new and desire to secure by Letters Patent is: Y'

'- l. In a drillingapparatus, a shell having Ya guideway, acradle having guides slidably mounted in the shell'guideway, a percussive rock drill slidably guided in the guides on said cradle, means for feeding said cradle frelative to said shell to effect feeding of the rock drill includinga feed nut carried vby said cradle and a cooperating feed screw saidcradle, meansvforfeeding said cradle relative to said shell tol eflectfeeding of the rock drill including a feed nut c-arried'by /saidcradle anda cooperating feedscrew on said shell, and' resilient double racting,

shock absorbing connect-ions between c said drilland cradle adapted to permit sliding movement of the drill relative to said cradle in opposite directions. l

3.' In a drilling apparatus,'a`sliell having -a guideway, a cradle having guides slidably 4mounted lin the shell guideway, a percussive rock drill slidably guided ingthe guideson 'said cradle, means forV feeding-said. cradle relative to said shell to effect feeding of the rockv drill including a feed nut carried by said cradle and a co-operatingfeed screwjon Y it., In, a drilling apparatus, a shell having a yguideway, a cradle having guides slidably mG-untedrin the shell guideway, a percussive rock drill slidably guided in the guides on saidcradle, means for feeding said cradle relative to said'shell to effect feeding of the rockdrill Vincluding a feed nut carried by said cradle and a cooperating feed screw on said shell, and vresilient ydouble acting shock absorbing'coiinections between said drill and cradle adapted to permit sliding movement of thel drill relative to said cradle -in opposite directions, and including projecting perforated lugsv on said drill and cradle, a bolt extending through the perforations in the lugs and `oppositely acting coiled springs encircling said'boltand interposed between said lugs. i j

5.l In a drilling apparatus, a shell having a guideway,a cradle having guides slidably mounted in the shell guideway, a percussive rock drill slidably yguided in the guides on said cradle, means for feeding said cradle relative tosaid shell to effect feeding of the Yrock drillincluding a .feed nut ycarried by said cradle and a cooperating feed screw on said shell, and resilient shock absorbing connections between said drill and cradle adapted to yieldto permit sliding movement of"` said drill ina rearward direction relative to said cradle `and includingv projecting lugs respectively carried by said drill and cradle and a spring yieldable to'permit relative movement between said lugs.

6. In a drilling apparatus, a shell having ,a guideway, a cradle having guides slidably mounted in the shell guideway, a percussive rock drill slidably guided in the guides on said cradle,ineans for feeding-said cradle" relative to said sliellto effect feeding of vthe rock drill including a feed nut `Carriedby v said cradle anda cooperating feed screw on saidshelhandresilient shocl'r absorbing connections between said drill and cradle adapted to yield to permit sliding movement -of said drill in a rearward direction relative to said cradlel and including projecting lugs respectively carried by said cradle and drill, a` bolt lextendingbetween said lugs, and a spring surrounding said bolt to the rear of the lug on said drill.r Y y j ratus,a shell having 7; In a drilling appa a guideway, a cradle having guides slidably mounted inthe shell guideway, a percussive rock drill slidably guidedl in the guides on said cradle, means yfor feeding-said .cradle relative to said shellto efectfeeding of the rOcCk drill includinga feed nut carried by `,1,33

said cradle and a cooperating feed screw on said shell, and resilient shock absorbing connections between said drill and cradle adaptf ed to yield to permit sliding movement of said drill in a rearward direction relative to said cradle and including projecting lugs rock drill including a feed nut carried by l said cradle and a cooperating feed screw onv said shell, and resilient double acting shock absorbing connections between said drill and cradle adapted to permit sliding movement of the drill relative to said cradle in opposite directions and including projecting lugs respectively carried by said cradle Vand drill, oppositely acting coiled springs arranged at opposite sides of said last mentioned lug, and a bolt extending through said springs and lugs. Y Y

`In testimony whereof I aHiX my signature.

ELMER G. GARTIN. 

